The term ?dissipation loss? can be found in the info sheet for a pressure sensor or pressure transmitter. One needs this specification in order to be in a position to protect the pressure sensor from overheating.
In Decadent is operated in a hot environment, it might be necessary to limit its electrical energy. If one neglects this aspect, one possibly risks an overheating and with this, in the worst case, a total failure of the instrument. So how can the correct electrical connection be managed?
Determination of the correct electrical connection based on the dissipation loss
First, the maximum permissible electrical energy for the pressure sensor should be known. That is given in the info sheet because the dissipation loss. Please be aware that the dissipation loss could be dependent upon the utmost expected operating temperature of the instrument and should be calculated where necessary.
If the allowable dissipation loss has been determined correctly, then the actual maximum electrical power for the pressure sensor that occurs can be determined. The determination can be executed expediently in two steps:
1. Determination of the voltage at the pressure transmitter utilizing the following formula:
UPressure transmitter = UVoltage source ? RLoad � Imax. Current supply
2. Calculation of the utmost electrical power for the pressure transmitter through the next equation:
PPressure transmitter = UPressure transmitter � Imax. Current supply
The maximum electrical power for the pressure transmitter (PPressure transmitter), which is now known, should be smaller compared to the permissible dissipation loss. If this is the case, both the power (UVoltage source) and the load (RLoad) were properly calculated and the electrical power of the pressure sensor will undoubtedly be within the permissible range under all operating conditions. Consequently, the pressure transmitter won’t heat too strongly and can withstand the required operating temperatures.
Note
Should you need any advice, your contact will gladly help you.